What We’ve Said

What we’ve said about Lamotrigine

22 points from 8 episodes, newest first

Also searched as Lamictal

In short

Lamotrigine is the best-tolerated mood stabilizer by a long shot: weak against mania, but in our experience relatively robust for bipolar depression, and a prevention drug rather than a treatment for acute states. Follow the titration protocol exactly, halve it with valproate, get to 200 mg, and keep it for bipolar illness rather than unipolar depression.

When we reach for it

  1. It is for prevention, not acute states. It helps prevent episodes of mania, but if a patient is already manic or hypomanic it will not work.

    “So it does help prevent the episodes of mania. But if a patient's manic or hypomanic, it's not going to work. So the best way to think of it, all these medications typically is you're preventing episodes more so than stopping them”
    44:16Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
    Also said in 1 more episode
    “I don't use lamictal for acute states, and you shouldn't either. Most of the evidence shows that it's for prevention”
    33:21The Best Bipolar Medication Review From The Best Bipolar ExpertJan 2025
  2. Its anti-manic efficacy is not fantastic, but its antidepressant effect in bipolar depression is relatively robust. Studies show it is not effective for acute depression, yet our clinical experience contradicts that: there is a really big mismatch between experience with it and the trial data that guidelines rely on.

    “its anti-manic efficacy is not fantastic, but its relatively robust antidepressant effect for bipolar depression, pretty great. I know the studies show that it's not effective for treating acute depression. I'm going to say my clinical experience contradicts that”
    43:07Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
    Also said in 1 more episode
    “I frankly do not know how to reconcile my clinical experience with it and the randomized trial data that It tends to get relied upon when people are drawing up treatment guidelines, for example, where there's just a really big mismatch”
    45:08Dr. Jim Phelps’ Bipolar Treatment Tier List: Lessons from 30+ Years in PsychiatryJul 2026Guest episode
  3. We are big fans of lamotrigine and low-dose lithium. In bipolar I, use lamotrigine as an adjunct to other tools: it does not have enough anti-manic prophylactic value to be monotherapy.

    “I'm a big glomotrigine and low-dose lithium fan. I think we talked about those some in our labs go around. And if people find it useful, more detail on how to do simplified social rhythm therapy”
    1:01:04How to Diagnose Bipolar Disorder with Dr. Phelps: Hypomania, Mixed States & the Clues DSM MissesSep 2026Guest episode
    Also said in 1 more episode
    “And then for bipolar one, as an adjunct to other tools, but it doesn't have enough anti-manic prophylactic value by itself to be monotherapy”
    46:25Dr. Jim Phelps’ Bipolar Treatment Tier List: Lessons from 30+ Years in PsychiatryJul 2026Guest episode
  4. When you are unsure about bipolarity, compare risks. Simplified social rhythm therapy is the number one mood stabilizer, then lamotrigine and low-dose lithium, and lamotrigine can be seen in the same low-risk light as social rhythm therapy rather than being stuck choosing between antidepressants and antipsychotics.

    “simplified social rhythm therapy is my number one mood stabilizer and then lamotrigine and low-dose lithium”
    42:40How to Diagnose Bipolar Disorder with Dr. Phelps: Hypomania, Mixed States & the Clues DSM MissesSep 2026Guest episode
    Also said in 1 more episode
    “you're not stuck with this antidepressants versus like antipsychotics. You can go antipsychotics versus social rhythm therapy. Oh man, from a risk benefit point of view, that's a no brainer, right? And then you can look at Lamotrigine in the similar light”
    1:00:26How to Diagnose Bipolar Disorder with Dr. Phelps: Hypomania, Mixed States & the Clues DSM MissesSep 2026Guest episode
  5. It is one of the mood stabilizers with antidepressant efficacy, the 'three Ls and a Q', named here as lithium, lamotrigine, trazodone and quetiapine.

    “Which are the MSAEs? This I thought was where you were going with the Ls. Three Ls and a Q for the mood stabilizers with antidepressant efficacy. I missed trazodone. Lithium, lamotrigine, trazodone, and we have to put quetiapine on there”
    50:45Dr. Jim Phelps’ Bipolar Treatment Tier List: Lessons from 30+ Years in PsychiatryJul 2026Guest episode
  6. In schizophrenia, before choosing a second antipsychotic, consider adding lamotrigine or lithium. If you must add a second antipsychotic, pick one appreciably different from the first.

    “just don't forget to consider things like lamotrigine, lithium to add on rather than choosing the second antipsychotic. If you have to choose the second antipsychotic, please pick one that actually is appreciably different than the one you're already using”
    Choosing Antipsychotics in Schizophrenia: Side-Effects, Maximizing Efficacy, and Finding the Right Medication | Episode 17Feb 2025
  7. We do see it help patients with emotional dysregulation who report depression, but not MDD proper. Do not use a drug that is not indicated just because its side effect profile matches what you want.

    “you don't use something that's not indicated just because the side effect profile matches the side effect profile that you want. For patients with emotional dysregulation and reporting depression, I do see it helpful. I don't see it helpful in MDD proper”
    1:07:08Antidepressant Tier List: Psychiatrists Rank Depression Medications for MDDMay 2026

Dosing and titration

  1. Absolutely follow the titration rules. The schedule is slower when you dose it with an inhibitor of its metabolism, such as Depakote. Follow the protocol and warn, warn, warn.

    “You should absolutely follow the rules. Do not titrate. You'll see a slower titration schedule depending on whether you're dosing the same time as an inhibitor of its metabolism, like Depakote, for example, or with other considerations. But follow that protocol and warn, warn, warn”
    45:15Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  2. Do not linger on lower doses. If you are going to use it, get it to 200 mg: it is so well tolerated and you get benefit. Do not be afraid to go above 200 either; you can go to 400.

    “Don't linger on lower doses, in my opinion. If you're going to use it, get it to 200. It's so well tolerated, okay, and you get benefit. But also, don't be afraid to go above 200 either. You can technically go to 400”
    49:18Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  3. Valproic acid jacks up lamotrigine levels, and rising lamotrigine is what we fear because of SJS. Whenever you combine them, halve the lamotrigine. Better still, avoid the combination, which is a huge pain, and review the protocol carefully if you must.

    “valproic acid jacks up the levels of lamotrigine. So the way I remember it is when you combine those two medications, it's the dangerous interaction. So increasing lamotrigine is what we're scared of because of SJS. So whenever you're interacting using those medications, you should half the lamotrigine”
    50:18Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
    Also said in 1 more episode
    “If you're ever trying to do both of those at the same time, I don't recommend it because it's a huge pain. Be careful and review the protocol carefully”
    50:38Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026

Side effects and safety

  1. It is the most well-tolerated mood stabilizer by a long shot. Because SJS is rare, we phrase that risk to patients as an allergic reaction.

    “They have no side effects or long-term risks. This is like almost nothing. Lamotrigine gets close, but otherwise it's almost nothing”
    39:06How to Stabilize Mood without Medications: Social Rhythm Therapy Anyone Can Use with Dr. Jim PhelpsNov 2026Guest episode
    Also said in 1 more episode
    “it is, as you say, it's the most well-tolerated mood stabilizer by a long shot. And frankly, I like to phrase the SJS risk because of its rarity as an allergic reaction”
    44:36Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  2. Tell patients that any new rash while starting it, one they have not had before and that is different, means stopping the medication and going to the ER. A same-day dermatologist works too and will know better than an ER doctor whether it is SJS.

    “We're talking about a rash that is new and that you haven't had before and that's different. If you get any new rash while we're starting this medication, I want you to stop the medication and go to the ER. That's how I do it”
    46:07Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
    Also said in 1 more episode
    “if you can get a same-day appointment of a dermatologist, you can do that too. Because to be frank, they're actually going to know a lot better than any emergency room doctor about whether or not it's SJS”
    47:34Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  3. Never tell a patient the rash is not a big deal. Give the proper response even if the system behind you is not built to respond to it appropriately.

    “don't be like, you know, the rash isn't that big a deal. Like, why don't you, like, you have to still give the proper responses, even if the system behind you is not built to appropriately respond to it”
    47:13Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  4. Manage it the way you manage low-dose lithium: do not let people have side effects, because that will blow the ballgame.

    “I think of it very much in the way that we talked about low-dose lithium in terms of how to manage it. Don't let people have side effects. That'll blow the ballgame”
    45:58Dr. Jim Phelps’ Bipolar Treatment Tier List: Lessons from 30+ Years in PsychiatryJul 2026Guest episode

Monitoring

  1. Pregnancy reduces serum lamotrigine levels by about half, probably through estrogen.

    “pregnancy will reduce the serum levels of lamotrigine by about half. I believe it's estrogen that does this”
    49:45Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026

Compared with others

  1. Of the evidence-based mood stabilizers it is the weakest, but also probably the best tolerated. Lithium is the gold standard.

    “Lamotrigine. which is the weakest, but also probably the best tolerated. We have lithium, which is the gold standard, the classic. And we have Depakote. Works great. There are some problems with it, especially with both male and female fertility”
    22:51The Best Bipolar Medication Review From The Best Bipolar ExpertJan 2025
  2. Many patients can get away with a lower daily dose of lithium when they are on 200 mg of lamotrigine, which is much more tolerable than lithium alone.

    “A lot of people can get away with having a lower daily dose of lithium if they're on their 200 of lamotrigine. And then it'll be much more tolerable than trying to do just the lithium, for example”
    51:46Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  3. Oxcarbazepine is probably less efficacious than lamotrigine, but at higher doses, in the right patient, it may actually be more efficacious.

    “Is it probably less efficacious than Depakote, Lamotrigine, and Lithium? Probably. But I also think that at higher doses, it may actually be more efficacious than Lamotrigine. If it's the right patient, it's actually not that bad”
    54:15Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  4. We doubt quetiapine is better in the long run than lithium plus lamotrigine, though no one studies that head to head.

    “is it actually better in the long run than let's say lithium plus lamotrigine? I don't think so. But, you know, they don't study that kind of thing head to head”
    16:57Antipsychotic Tier List: Ranking the Best and Worst Anti-psychoticsOct 2026

Pearls

  1. If a patient is already on a lot, get rid of something first so lamotrigine gets a fairer trial, especially an antidepressant: being on one makes it less likely lamotrigine will show what it can do.

    “get rid of something first so that Lamotrigine gets a fairer trial. In particular, antidepressants. Patients who are already on an antidepressant makes it less likely that lamotrigine will demonstrate its remarkable capacities”
    47:03Dr. Jim Phelps’ Bipolar Treatment Tier List: Lessons from 30+ Years in PsychiatryJul 2026Guest episode

Pitfalls and myths

  1. Because it has so few side effects, clinicians can keep patients on it and never offer what the correct treatment is.

    “sometimes I worry that medications without side effects like lamotrigine and bupropion, people will keep patients on and then not offer what the correct treatment is”
    51:09Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026
  2. We are personally against using lamotrigine or other mood stabilizers for borderline personality disorder. Some people believe in it, but the signal from that small old UK study is not convincing.

    “I'm definitely against that, personally speaking. I know some people are believers in that, and there's this tiny little signal from that old UK study. But I don't really believe in that”
    14:48Mood Stabilizers for Bipolar Disorder: Lithium, Lamotrigine, Depakote & MoreJul 2026

It also comes up on

From these episodes

Every point above is something said on the Psychofarm podcast, with the words as spoken and a link to the moment in the episode. It is education, not medical advice, and an episode reflects what we thought when we recorded it.

Educational content only. Everything here is what was said on the Psychofarm podcast, for clinicians. It is not medical advice and not a substitute for clinical judgment, current labeling or guidelines. An episode reflects what we thought when we recorded it, so check anything before you rely on it.